GM Service Manual Online
For 1990-2009 cars only

Low and High Beams Headlamps Inoperative Pontiac

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the headlamps on.
  2. Turn the headlamp dimmer switch to the low beam position and then to the high beam position.

Do the headlamps illuminate during both situations?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Connect a test lamp between the headlamp switch terminal J and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the replacement?

--

Go to Step 6

--

5

Repair a poor connection or an open in the battery positive voltage circuit of the headlamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 6

--

6

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3

Low and High Beams Headlamps Inoperative Chev Dom, Gulf States, Eur, Scan, Jap

Step

Action

Value(s)

Yes

No

1

Did you perform the Diagnostic System Check?

--

Go to Step 2

Go to Diagnostic System Check - Lighting Systems

2

  1. Turn the headlamps on.
  2. Turn the headlamp dimmer switch to the low beam position and then to the high beam position.

Do the headlamps illuminate in both situations?

--

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Connect a test lamp between the headlamp switch terminal E and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 4

Go to Step 5

4

Connect a test lamp between the headlamp dimmer switch terminal B and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 6

Go to Step 7

5

Connect a test lamp between the headlamp switch terminal J and ground. Refer to Circuit Testing in Wiring Systems.

Does the test lamp illuminate?

--

Go to Step 8

Go to Step 9

6

Replace the headlamp dimmer switch. Refer to Dimmer Switch Assembly - Disassemble - Off Vehicle and Dimmer Switch Assembly - Assemble - Off Vehicle .

Did you complete the replacement?

--

Go to Step 10

--

7

Repair a poor connection or an open in the signal circuit of the headlamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 10

--

8

Replace the headlamp switch. Refer to Headlamp Switch Replacement .

Did you complete the replacement?

--

Go to Step 10

--

9

Repair a poor connection or an open in the battery positive voltage circuit of the headlamp switch. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 10

--

10

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 3